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Re: [PATCH] Enhance reload_cse_move2add
On 07/02/2010 12:58 PM, Jie Zhang wrote:
168.wupwise 1260 1232 -2.22%
189.lucas 1406 1380 -1.85%
Lucas is insanely dependent on register allocation and scheduling. With
-fweb and -frename-registers both disabled at -O2, I suspect the reason
of the regression is that your patch increases register lifetimes and
makes scheduling a bit harder. I don't think this should be a reason to
hold up your patch though, it would be more profitable to add some kind
of rematerialization to the scheduler.